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4 protocols using anti pna fitc

1

GC Formation Analysis in Mice

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For GC formation analysis, the spleens from 1-year-old mice or SRBC-immunized mice were detached and frozen in OCT compound. Tissues were sectioned to 7 μm thickness, fixed in acetone at −20 °C, washed with PBS, and blocked with 0.1% BSA in PBS for 30 min at room temperature. Tissues were stained with anti-PNA-FITC (Sigma-Aldrich, St. Louis, MO, USA), IgD-PE, and CD4-APC (eBioscience) antibodies diluted in blocking solution overnight at 4 °C. The tissues were incubated with ProLong Gold anti-fade reagent (Life Technologies, Carlsbad, CA, USA) for 30 min at 4 °C, and images were obtained using a Leica DM IRE2 confocal microscope.
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2

Immunohistochemical Analysis of Germinal Centers

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Mice aged 6 to 8 weeks old were immunized with sheep red blood cells (SRBC) and spleens were harvested 9 days later. Spleens from 1-year-old mice were also collected to analyze TFH cells and GC formation. The tissues were frozen in OCT reagent and sectioned into 7-µm slices. The frozen sections were stained with anti-PNA-FITC (Sigma-Aldrich, St. Louis, MO), IgD-PE, and CD4-APC (eBioscience) overnight at 4°C. After washing, Anti-Fade reagent (Invitrogen, Life Technologies, Carlsbad, CA) was added to the slides, which were visualized using a Leica DM IRE2 confocal microscope.
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3

Multi-color Flow Cytometry Protocol

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For cell surface staining the following mAbs were used (from BD Biosciences unless otherwise stated): Anti-CD3-FITC (145-2C11), anti-CD4-APC (RM4-5), anti-CD19-APC (1D3), anti-CD19-Pacific Blue (1D3, eBioscience), anti-CD43-Biotin (S7) detected with SA-Alexa-647 (Invitrogen), anti-CD43-FITC (S7), anti-CD44-FITC (IM7), anti-CD45-PercP (30F11), anti-CD69-PE (H1.2F3), anti-CD79 (polyclonal rabbit) detected with goat-anti-rabbit IgG-Alexa-649 (Molecular Probes), anti-CD79b-DyLight-488 (HM79), anti-CD79b-Dylight-649 (HM79), anti-CD80-PE (1610A1), anti-CD86-PE (GL-1), anti-B220-PerCP (RA3-6B2), anti-FcγRIIB-Dylight-488 (2.4G2), anti-Hamster IgG FITC (G70-204/G94.56), anti-IA/IE FITC (2G9), anti-IgD-PE (11-26, Southern Biotech), anti-IgM-Dylight-649 (b-7-6), anti-MHC-II-Dylight-488 (D3.137), and anti-PNA FITC (Sigma). Cells were incubated with Fc block (BD Biosciences) and stained in FACS buffer (PBS+1% BSA + 0.02% NaN3) to reduce non-specific staining. Flow cytometry was performed on cells using a CYAN flow cytometer (Beckman Coulter) or FACS Calibur flow cytometer (BD Biosciences) and analyzed using FlowJo (Treestar), CellQuestPro software (BD Biosciences) and PRISM (Graphpad Software).
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4

Immunohistochemical Analysis of GC Formation

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For GC formation analysis, the spleens from six- to eight-week-old sheep red blood cell (SRBC)-immunized mice were isolated 7 days after immunization and frozen in OCT compound. Tissues were sectioned to a 7-μm thickness, fixed in acetone at −20 °C, washed with PBS, and blocked with 0.1% BSA containing PBS for 30 min at room temperature. Tissues were stained with anti-PNA-FITC (Sigma-Aldrich, St. Louis, MO, USA), IgD-PE, and CD4-APC (eBioscience) antibodies diluted in blocking solution overnight at 4 °C. After three washes, tissues were incubated with ProLong Gold anti-fade reagent (Invitrogen, Life Technologies, Carlsbad, CA, USA) for 30 min at 4 °C and images were obtained using a Leica DM IRE2 confocal microscope.
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